Effect Of Low-temperature Plasma Surface Treatment On The Function Of UHMPE Fibrous Composite Material And The Test On It.

The ultra high module polyethylene (UHMPE) fibrosis is chemically inactive with low function on its surface. It lacks active radical on its surface. And ultra high module polyethylene fiber is highly symmetrical structure of methylene, which makes the fiber possesses high crystallinity and degree of orientation. On one hand, this ensure that it has relatively high strength in terms of mechanics; on the other hand, it makes the external chemical inertness of the fiber very obvious, which is mainly represented by the low interface binding force after the colophony plasma is made into composite material. So it is necessary to modify the ultra high module polyethylene fiber. This paper mainly researches into the ultra high module polyethylene fibrosis by low temperature plasma surface treatment and various strength function of epoxy colophony composite material, and makes tests on the composite material made from mixing UHMPE fiber and E-glass fiber. The research shows: (1) after introduced oxygen polarity radical into the UHMPE fibrosis by low temperature plasma surface treatment, fiber surface is etched by plasma, and is mechanically linked to opoxy colophony. Evulsion strength improves by 5 times and the fiber strength lose by 10% or so.(2)o2-plasma treatment did not affect the tensile and flexural properties of UHMPE fiber composites greatly(within 10%), however increased the inter laminar shear strength(ILSS)by 57%.And the ability of energy absorption in impact test was decreased a little after o2-plasma treatment. (3). SEM observation showed that the surface layer of treated UHMPE fiber was the most weak in the composites, and that it was damaged in shear stress. (4)the stiffness and drnsity of UHMPE fiber composite were lower ,but the toughness and flexural properties were higher than those of E-glass fiber composite .The specific modulus and specific strength were as high as E-glass fiber composite. (5)UHMPE fiber/E-glass fiber hybrid composites made up defect of UHMPE fiber composite and E-glass fiber composite .the hybrid effect coefficient was as high as 15%(6) the shortcomings of UHMPE fibers can be overcome by mixing into other fiber.